Problem 1321. Given a matrix, swap the 2nd & 3rd columns

Created by Harish Maradana

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If
a = [1 2 3 4;
     1 2 3 4;
     1 2 3 4;
     1 2 3 4];
then the result is
ans = [1 3 2 4
       1 3 2 4
       1 3 2 4
       1 3 2 4];
by swapping columns 2 and 3.

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Last Solution submitted on Dec 29, 2024

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goc3 on 6 Apr 2017

Additional test cases have been added.

Informaton on 17 May 2017

This is a poor question in that it tells you to swap the middle two columns of a 4x4 matrix, but then tests things other than than 4x4 matrices. You'll have to study the test cases and the given answers to see what the test maker is really after here :(

William Katzianer on 28 Aug 2018

You may want to change the test description. You are not actually looking for the middle two columns. I won't give away the solution, but the columns you need to swap are hard-coded in. And using the two middle columns is ambiguous if the array is not an even length.

Jiawei Gong on 5 May 2020

Can't understand test case 5. Can you improve this problem description?

Tahmina Tabassum Treena on 17 Jan 2021

This question should be corrected as the test cases are not 4*4 in all cases.

Luis Fernando Gutierrez Urzua on 31 Jan 2021

The problem is wrong.

goc3 on 2 Feb 2021

The problem title and description have been improved.

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Problem 1321. Given a matrix, swap the 2nd & 3rd columns

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Problem 1321. Given a matrix, swap the 2nd & 3rd columns

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